138 
PROCEEDINGS OF THE VICTORIA INSTITUTE. 
Turbo Linne. 
114. T. ■fcix'foer* Linn. Chenu, Conch, vol. i, f. 2577. 
Nerita Linne. 
115. TV. ■p<3lox°oil‘ta Linn. Wood, Tnd. Test.pl. xxxvi,f. 46. 
116. IV- £1 11 ti llxix* ixiix Gmel. Wood, Ind. Test, Nerita, 45. 
N". prcecognita Adams. 
Neritina Lamarck. 
117. TV. ixxi<ji"0!Stoiii£t Orb. Moll. Cuba, vol. ii, p- 47, 
pi. xvii, f. 35. 
118. TV- meleagTis Linn.=N. ehlorina Link. 
TL virginea Orb. Yoy. Amer. Mer. pi. lvi, f. 1-3. 
N. jamaicensis Adams. 
119. TV- "vii'idLs Linn. Chenu, Conch, vol. i, f. 2460. 
Order Fissurellacea. 
Fissurella Lamarck. 
120. X^. I'Xicliatxt Lam. Wood, Ind. Test. Patella 101. 
121. F. altemata Say. 
122. Ip- nodosa Born. Chenu, Conch, vol. i, f. 2759. 
123. F m xiiml>osa Linn, Chenu, Conch, vol. i, f. 2755. 
Emarginula Lamarck. 
124. IT. tenssjx n. sp. 
Subconic, moderately thick, white, with seven ribs running 
from the apex to distinct angles on the periphery of the shell, 
three of these ribs are much larger than the others and of these 
the central one covers the deep anterior sinus. There are two 
ribs of the second order and two of the third. Two other ribs 
run from the apex to the sides forming scarcely any angle. 
Between each of the nine principal ribs there are 5—8 liner costellfe- 
Apex smooth nearly central, slightly recurved backwards. 
Margins dentate, emarginate by a notch at the sinus. General 
contour roughly seven-angled and much wider behind than before. 
Interior lead-colored with a strongly marked sinus occupying the 
cavity of the largest rib. 
